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1
Preheat the oven to 350F.
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2
Press crust mixture into the bottom and up the sides of a 9-inch pie plate.
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3
Freeze 15 minutes.
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4
Cover edge with foil.
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5
Bake until beginning to dry out, about 15 minutes.
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6
Transfer to a wire rack; let cool completely.
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7
(Leave oven on.)
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8
Stir yogurt, vanilla seeds, and zest in a bowl.
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9
Stir in butter and yolks.
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10
Stir sugar, flour, and salt in a bowl; stir into yogurt mixture until smooth.
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11
Pour into crust.
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12
Bake, with foil covering edge of crust, until just set in center, 45 to 55 minutes.
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13
Transfer to a wire rack; let cool 1 hour.
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14
Spread jam over center of pie.
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15
Refrigerate at least 3 hours (up to overnight).
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16
Pulse the flours, wheat germ, salt, and cinnamon in a food processor to combine.
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17
Add the butter and sugar; process until dough just holds together.
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18
Use immediately.
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19
Bring all ingredients to a boil in a large stockpot, mashing with a potato masher.
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20
Cook, stirring frequently, until mixture is the consistency of very thick honey, 5 to 10 minutes.
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21
Remove plum skin if desired.
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22
Discard vanilla bean and zest.
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23
Do not strain; jam should be chunky.
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24
Refrigerate in an airtight container up to 1 month.